The World book encyclopedia : volume 1
World Book, 1985
Buku Referensi
The World book encyclopedia : volume 3
World Book, 1985
Buku Referensi
The World book encyclopedia : volume 4
World Book, 1985
Buku Referensi
The World book encyclopedia : volume 6
World Book, 1985
Buku Referensi
The World book encyclopedia : volume 7
World Book, 1985
Buku Referensi